Comment by Eiim

You can still be sued. At that point, you either: a) defend yourself as normal, while attempting to maintain anonymity (difficult & doesn't solve anything) b) let the case go to default judgement (for likely an enormous amount of money) at which point Nintendo has every reason to try to track you down in real life, and can use the courts to help them do so. Hope you were really, really thorough about your anonymity.